issue with "for name ... [ in word ... ] term do list done"

[Vincent Lefevre <vincent@xxxxxxxxxx>]

I'm wondering whether the zsh extension about the optional "in word ..."
can be disabled, or perhaps zsh could signal an error if it can detect
that a name except the first one is not used.

The issue is that I forgot "in", and I was wondering why my command
was not working.

For instance,

  for i ab cd ; do do_something_with $i ; done

in an interactive zsh shell does nothing, while the other shells
signal a syntax error, which is much more useful.

BTW, words are optional, so that

       for name ... [ in word ... ] term do list done

in the zshmisc(1) man page is incorrect. It should be

       for name ... [ in [ word ] ... ] term do list done

And `in word' should be replaced by either `in' or `in [ word ]',
otherwise a case like "for i in ; do echo $i ; done" could be
misinterpreted.

-- 
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)